Plant repairing method of agricultural land polluted by heavy metal

Abstract

A plant method for restoring the agicultural field polluted by heavy metals includes such steps as screening the agricultural crops which features that their roots can absorb heavy metals but their seeds contains less heavy metals, and planting them in said polluted field.

Description

technical field [0001] The invention belongs to the technical fields of agriculture and environmental protection. It specifically relates to a method for phytoremediation of agricultural land polluted by medium and low heavy metals. Background technique [0002] In view of the seriousness and urgency of soil heavy metal pollution, countries all over the world have paid great attention to the prevention and control of heavy metal pollution, and have explored a variety of treatment technologies, mainly soil solidification, vitrification, leaching, soil washing, guest Indigenous method and electrochemical method, etc. However, traditional heavy metal pollution control technologies are expensive and difficult to use on a large scale. Finding a cheap, permanent and effective treatment method that can maintain soil fertility has always been a difficult and hot topic in international research. In 1977, Brooks proposed the concept of hyperaccumulator. In 1983, Chaney proposed the...

AI Technical Summary

Problems solved by technology

Although there have been successful cases of hyperaccumulator plants for the remediation of heavy metal-contaminated soils, the current application range is still very limited

The main problems faced by this technology are: (1) most of the heavy metal hyperaccumulator plants that have been found so far have very low biomass and are difficult to be directly applied; (2) the use of biotechnology to transform hyperaccumulator plants to improve their biological The research on creating new high-biomass plants with high heavy metal accumulation capacity has just begun, and it will take a long time to achieve the goal; (3) For my country, there are still constraints in terms of actual national conditions: my country There are a large number of medium and low pollution agricultural lands. Due to the huge population pressure in our country, the vast majority of these agricultural lands are currently being used for crop production and play an important role. If hyperaccumulator plants are used to remove soil heavy metals, these farmlands will not be able to be used for crop production in a long period of time, and are generally difficult to be accepted by farmers